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' 2 Sheets-Sheet 1. R. VOSB. .GAB SPRING.

(N0 Model.)

No. 292,775. Patented Jan "29,1834.

Q WITNESSES: I h

ATTORNEY e r. Washington D. t;

UNrrnn. ST T S,

PATEN 1 7m RICHARD vosn, orlvnw roan, N. r.

. SPECIFICATION forming part of Letters Patent No. 292,775, datedJanuary 29, 1884.

4 Application filed October 22, 1583. (N0 model.)

specification,referencebeing had to the accom panying drawings, whichform a part of this specification.

My invention relates to the novel arrange-- ment of spiral springs soarranged that the individual heaviest bearing-spring first receives theload orweight, and then the surrounding grouped springs are brought intoaction, when all are operated together and form a graduated springcapable of carrying'a light load or .an

empty car without rattling and of sustaining a heavy load without anentire exhaust of bearing-power, as hereinafter described.

In the drawings, Figure 1 is a sectional view of Fig. 2 on line 00 00,showing myimprovement, in one View P showing the case on the outer coil,and l? showing the casing removed half way round the outer auxiliarycoil, and showing,'also, the sectional view of the coil-' spring, ashereinafter stated. Fig. 2 is a sectional view of Fig. 1 on line 3 3 andis a plan view, the plate usually used above said springs being removed.

A is the heavy spiral spring,whose bearing capacity is greater than anyother one of the group.

' two combined form a spring like the one shown in and covered byLetters Patent of the United States granted-to me, No. 214, 328, datedApril 15, 1879.

G is the spiral cone, as well as-D, whose bearing capacity, individuallyor singly, is not equal to that of A, but when combined together, orcombined in groups in four surrounding the spring A, are, combined, ofgreater bearing capacity than A.

In the drawings, A is the longer as well as the heavier spring. Itextends so that when at rest it is held in an upright position, andprevented from rattling by means of carryingplates H H. plates are castthe lugs or studs (1 d d d,which are so constructed as to enter into thebolster underneath the car when the same are used.

I11 these bearing or carrying rattling, besides holding these conicalsprings in place,-ready to act when the weight, in-

creased, rests on them as well as on coil A,

D is the inner conical coil, put inside of coil" A, and acts as anauxiliary aiding spring same are placed on the bearing-plate H, thespring A is of sufficient, bearing capacity to carry the light loadwithout the assistance of 'the auxiliaries B, O, and D. The loadincreased,

the spring A is decreased in longitude till the bearing-plate rests onthe spiral O and D and B, and these all aid the heavier spring A tocarry the load. Now, it will readily be seen that I obtain in a littlespace a spring formed of the combined coiled spirals that is adapted tocarry an empty freight-car oraheavy loaded one, all with, the same easeand without danger of fracture, as would be the result if in carrying anempty car the coils O and D were not brought intoaction, but allowed towabble about till the load, increased, brings the plate H down ontothem, when, if they are not in an upright position, they would receivethe load on them laterally and cause a fracture.

In drawing No. 2, Sheet 2,I show how I would arrange a group of fivesprings, in which the center coil is the heavier coil; but the fourcoils 1, 2, 3, and 4:, combined in resist ance, would be greater thanthe center coil, 5. It will also be as readily seen that I can soarrange coils 1 and 3 that they may be of greater longitude than coils land 2 that coils at and 2 are shorter than coil 5, and coil 6 greaterthan 'coils 4: and 2 and less than coil 5. The action, then, would be:an empty car would rest on coil 5, while the-rims would hold coils 6,4c, 3, 2, and 1 in position. creased, the coils 5 and 6 would bear all;further increased, the coils 5, 6, 4c, and 2; the load further increasedwould rest on allcoils; and so, in a small space, a several steppedgraduated spring is obtained whose combined bearing capacity is of greatpower.

I am well aware that there is a combined spring heretofore made in whichthe lighter The load in- 6o equally with G and D,-that is, when theempty car is placed upon the truck-bolster and the springs are ofgreater longitude, and thus receive the load first. They depressed, theload is then brought to bear upon the stronger spring. The greaterspring is in such cases always the last one acted upon, and, till it isacted on, is left to rattle and shift about, especially under emptycars; but by my invention I avoid this, and bring the heaviest springinto active bearing first, so that it cannot rattle, and by the rimshold the lighter collateral springs into position, ready for action.

I show lugs d (l, which are made sharppointed, so that they are driveninto the bolster by the weight of the car without any provision made fortheir reception, as the car-body is placed upon the spring, thus savingthe necessity of boring a hole, as heretofore has been necessary.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. A spring for railroad-cars, composed of a spiral coil-bar having inits interior a conical-shaped spiral coil, in combination with two ormore conical spiral coils which act as collateral springs, and whichsingly are weaker than said spiral coil A, all so arranged that thespiral coil having the greatest bearing capacity is first acted on, andthen action is brought to bear upon the weaker spiral conical coils,substantially as described, and for the purpose specified.

2. A group of spiral coiled springs for railroad-cars, composed of twoor more spiral coils comically shaped, of less bearing capacity than thecenter spiral coil, A, all graduated as described, whereby the heavierspiral coil first receives the weight, and the weight being increased,said spiral is assisted by the difierently graduated conically shapedspirals, which singly have less bearing capacity than the spiral coil,substantially as described, and for the purpose specified.

\Vitness my hand this 20th day of October, 1883.

ltlCl'ljARl) 'VOSE.

\Vitnesses: JOHN G. N. UUIBERT, James QU'INLAX.

